Resolution:
A lock specified by a cylinder suffix BDC will be supplied with a disposable small format construction core, see Figure 1 below. There is no metal key but instead the BDC cylinder has a ...

Resolution:
A small format disposable core is used as a SFIC construction core that is for low security applications and can be thrown in the waste bin after use.

Resolution:
A control key is required to install or remove an interchangeable core from a housing or lever. The control key is identified by having "CONTROL" stamped on the bow. How to install and remove an i...

Resolution:
Conventional Cylinders - A conventional cylinder is one that requires some breakdown of the lock in order to be removed.
These are the most commonly used cylinders sometimes called key-in-lever...